Honestly, your posts are a little confusing...
first you said the tank had been running for about 8 weeks and had already cycled. Now you are saying you ran it with no fish and just added two last week. Please clarify---exactly how long has the tank been running with fish in there?

Might be okay to add a clown, but I would probably wait a few weeks and this would be your last fish in that small tank. I would also make sure to quarantine all new arrivals for 3 weeks in any case. I provided the reasons for this in the two articles I gave you._________________Keepin' marines happy for 25 years